AllRepairServices
Something is not working correctly. We diagnose the system, document the problem and explain the repair options before work begins.
View Repair Services
Repairs begin with diagnosis.Installations begin with design.
We document what we find, explain the options and provide the price in writing before work begins.
Licensed & Insured
No Technician Sales Commission
Response Within 24 Hours
Serving Greater Boston
How can we help?
Start with what your home needs.
Choose the path that best describes what is happening in your home.
AllInstallationServices
You are replacing or adding a system. We measure the home, calculate what it needs and design the installation around those findings.
View Installation Services
IndoorAirQuality
Duct cleaning, video inspection and mold testing guided by evidence from your home.
View Air Quality Services
HeatPumpConversion
Convert from oil or gas heating with measured system design and cold-climate equipment planning.
Explore Heat Pump Conversion
HomeWellness
Measured checkups, documented findings and ongoing care for the systems your home depends on.
Explore Home WellnessWhy 617 HVAC
See what we see.Measure what matters.Then decide.
For repairs, we use photos, video, system readings and testing to identify the problem before recommending work.
For installations, we measure the home, calculate its heating and cooling needs, select equipment that fits those findings and evaluate the ductwork or distribution system supporting it.
We explain the options, provide the price in writing and let you decide what happens next.
Learn About Our ProcessThe repair-first difference
Repair when practical.Replace when findings support it.Replace when the findings support it.
We do not recommend replacement when a practical repair can solve the problem. Our technicians are paid to diagnose the system and do the job correctly-not to earn a commission from selling new equipment.
When another company has recommended replacement, we test, measure and document the equipment before agreeing that replacement is necessary.
About 80%
In the second-opinion calls we receive after another company recommends replacement, we find a repairable problem about 80% of the time.
About 1 in 5
In roughly one out of five of those calls, replacement is the right decision. When the findings support replacement, we explain why and show you what we found.
How pricing works
We diagnose, document what we find and put the price in writing - before any work begins.
- 1
Diagnose the system
- 2
Document the findings
- 3
Written price for your approval
Planning a new system?
Designed around the home—not just the equipment.
A new system begins with an in-home assessment. We measure the space, calculate its heating and cooling needs, review the existing distribution system and explain the options that fit the home.
The goal is not simply to install equipment. It is to design a system that works with the home, the occupants and the way the space is actually used.
Exploring a heat pump?
617 HVAC helps eligible homeowners understand available Mass Save heat-pump incentives, qualifying equipment requirements and the documentation connected to the project.
Local experience
Built for Greater Boston homes.
Pre-war homes, triple-deckers, tight basements, steam systems, additions and homes without conventional ductwork all require different solutions. Greater Boston’s housing stock is our home field.
Local by design.Repair-first by practice.
617 HVAC is based in Arlington and serves homeowners throughout Greater Boston. We built the company around documented diagnosis, thoughtful system design, clear communication and written pricing before work begins.
Our goal is straightforward: understand the system, explain what we found and help the customer make an informed decision.
ArlingtonCambridgeSomervilleBostonLexingtonBrooklineNewton
Selected Customer Reviews
“They installed a mini split system for our House. They explained the whole process and I felt very comfortable using this company. I would definitely use them again in the future..”
“They are amazing, highly recommended, they were efficient and transparent and explained everything so clearly. Will never call anyone else!”
“They installed a water for us. They Installed it the same day. They were very profesional and clean.”
From the 617 Knowledge Hub
Understand your home before making the decision.
Practical guidance about repairs, comfort, indoor air, heating, system design, home performance and the Greater Boston communities we serve.
Live CoolerAir-conditioning guidance about cooling problems, repair decisions, comfort, efficiency and system design.
Featured guide
What to Ask Before Hiring an AC Installer in Boston
Breathe BetterGuidance about airflow, humidity, filtration, dust, mold risk, ductwork and indoor air quality.
Featured guide
Indoor Air Quality: What It Is and Why It Matters
Heat SmarterClear information about heating systems, heat pumps, efficiency, comfort and cold-weather performance.
Featured guide
When to Replace Your Furnace vs. Repair It
617 Home Wellness StandardHow inspection, monitoring, optimization and protection work together across the home.
Featured guide
HVAC Between Service Visits: Homeowner Checklist
617 Community EngagementLocal spotlights, meet-and-greets, authority reports, projects and community knowledge.
Explore Community EngagementFollow the work
See what we’re working on across Greater Boston.
Follow repairs, installations, system walkthroughs, homeowner education, local projects and the people behind 617 HVAC.
Featured Social Content
Recent repair findings, second-opinion diagnoses and documented work from homes across Greater Boston.
Follow on InstagramInstallation design and project-progress updates from homes across Greater Boston.
Follow on Facebook
YouTube
Homeowner education, system walkthroughs, practical answers and behind-the-scenes video.
Watch on YouTubeFrequently Asked Questions
Straight answers about working with 617 HVAC.
How quickly will 617 HVAC respond?
Service requests receive a response within 24 hours. The office will contact you to review the request and agree on the next available service time.
What happens during a repair visit?
The technician begins by testing and measuring the system, documents the findings, explains the diagnosis and provides the repair price in writing before repair work begins.
How does repair pricing work?
Repair service begins with the service reservation, mobilization and diagnostic process. Once the problem is identified, the recommended repair is priced in writing for your approval.
What happens during an installation assessment?
We review the home, measure the space, discuss comfort concerns, examine the existing system and distribution and gather the information needed to design appropriate options.
Do you work on older Greater Boston homes?
Yes. We regularly work with pre-war homes, triple-deckers, steam-heated properties, tight mechanical spaces, additions and homes without conventional ductwork.
What areas do you serve?
617 HVAC is based in Arlington and serves homeowners throughout Greater Boston. Visit the service-area page for the complete list of communities.
Start with the right next step.
Need an existing system diagnosed or planning a new one? Choose the service path that fits your home.
Prefer to speak with someone?
Call (617) 835-8058